The charging document for Clark states some shocking allegations. Investigators with the Harris County Precinct 4 Constable's Office reviewed Clark's polygraph from July 14th and say the statements he made alarmed them to take action.

The document said Clark not only admitted he had "looked at nude females under the age of 17" but also confessed to having sex with two 14-year-old girls when he was 18 in Dallas. When asked when was the last time he saw child porn online, he said about 10 times last year and the last time was in June of this year.

Those polygraph results were enough for the Constable's office to get a warrant and search his home.

In total, Constable Herman said they recovered thousands of explicit photos. His office couldn't go into further detail about other allegations in the document.

"Sad this is sad," said one neighbor.

Clark's neighbors are in disbelief and say their minds are left to wonder.

"There's children here and there's children there," said another neighbor. "You don't expect to see that in your neighborhood, you don't."

Humble ISD issued the following statement: "An Humble ISD nighttime patrol officer has been charged with possession of child pornography. Nighttime patrol officers do not interact with students on a regular basis. He was hired in July 2015 and on August 2, 2017 he was placed on administrative leave pending the outcome of the investigation. Humble ISD will continue to work with Precinct 4 in this matter."

Clark, 48, has been charged with 10 counts of possession of child pornography.